Comparative Study of IV Esmolol, IV Diltiazem, and IV Lignocaine Hydrochloride in Attenuating Pressure Response to Laryngoscopy and Intubation
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Jemds.com Original Research Article Comparative Study of IV Esmolol, IV Diltiazem, and IV Lignocaine Hydrochloride in Attenuating Pressure Response to Laryngoscopy and Intubation Sathya Narayanan Karunanithi1, Geeta Bhandari2, Kedar Singh Shahi3, Aditya Kumar Chauhan4, Pooja Gautam5 1Department of Anaesthesiology, Critical Care, Pain and Palliative Medicine Government Medical College, Haldwani, Uttarakhand, India. 2 Department of Anaesthesiology, Critical Care, Pain and Palliative Medicine Government Medical College, Haldwani, Uttarakhand, India. 3Department of Surgery, Government Medical College, Haldwani, Uttarakhand, India. 4Department of Anaesthesiology, Critical Care, Pain and Palliative Medicine Government Medical College, Haldwani, Uttarakhand, India. 5Department of Anaesthesiology, Critical Care, Pain and Palliative Medicine Government Medical College, Haldwani, Uttarakhand, India. ABSTRACT BACKGROUND Not many studies have compared more than two drugs in attenuating pressor Corresponding Author: responses to laryngoscopy and intubation. This study compares four groups of Dr. Geeta Bhandari, considerable size. The present study compared intravenous esmolol, diltiazem, and Professor and HOD, Department of Anaesthesiology, lignocaine, for their efficacy to abate pressure response to laryngoscopy and Critical Care, Pain and Palliative Medicine, intubation. Government Medical College, Haldwani-263139, Uttarakhand, India. METHODS E-mail: [email protected] This is a prospective, randomized, double-blinded, controlled clinical study conducted among 220 patients of ASA grade I/II (age 18–60 years), undergoing DOI: 10.14260/jemds/2020/447 elective surgical procedure requiring general anaesthesia with endotracheal intubation over a period of 15 months at a tertiary hospital setup. Study subjects How to Cite This Article: were categorised as Groups D, E, L, and N that received diltiazem (0.2 mg/Kg IV), Karunanithi SN, Bhandari G, Shahi KS, et esmolol (2 mg/Kg IV), lignocaine (1.5 mg/Kg IV), and normal saline, respectively; al. Comparative study of IV esmolol, IV each group had 55 patients. Haemodynamic parameters were recorded at baseline, diltiazem, and IV lignocaine hydrochloride after drug administration, immediately after intubation, and at 1-, 3-, and 5-minutes in attenuating pressure response to after intubation. Data entry and analysis were performed using MS Excel and SPSS- laryngoscopy and intubation. J. Evolution PC-17 version, respectively. One-way ANOVA and the chi-square test were used to Med. Dent. Sci. 2020;9(29):2053-2057, evaluate the difference. P < 0.05 was considered significant. DOI: 10.14260/jemds/2020/447 Submission 30-04-2020, RESULTS Peer Review 14-06-2020, A maximum increase in haemodynamic parameters occurred immediately after Acceptance 20-06-2020, intubation. The increase in heart rate and rate pressure product were significantly Published 20-07-2020. lower in Group E (+2.93% & +15.31%), whereas the increase in blood pressure was lower in Group D (8.51%). Copyright © 2020 JEMDS. This is an open access article distributed under Creative Commons Attribution License [Attribution CONCLUSIONS 4.0 International (CC BY 4.0)] Haemodynamic stability during laryngoscopy and endotracheal intubation is an integral and essential goal of any anaesthetic management plan and was more effectively maintained with esmolol and diltiazem than with lignocaine. KEY WORDS Diltiazem, Esmolol, Lignocaine, Haemodynamic Response, Intubation, Laryngoscopy, Normal Saline, Intravenous J. Evolution Med. Dent. Sci./eISSN- 2278-4802, pISSN- 2278-4748/ Vol. 9/ Issue 29/ July 20, 2020 Page 2053 Jemds.com Original Research Article BACKGROUND The drug should be used with caution in patients with impaired renal or hepatic function.[15-17] Lidocaine is [2-(Diethylamino)-N-2, 6-Dimethyl phenyl Endotracheal intubation has become an integral part of acetamide)] an amide group of local anaesthetic agent. It is airway management since its description in 1921 by metabolized by oxidases and amidases from microsomes of [1] Rowbotham and Magill. Laryngeal, tracheal, and bronchial liver and the metabolites are excreted in the urine, hastened receptors are stimulated by mechanical and chemical when the urine is acidic.[13] [2] irritants during laryngoscopy, intubation, and extubation. Only a few studies with compact sample sizes comparing Surges in blood pressure and heart rate (HR) due to reflex the efficacy of intravenous (IV) lidocaine, esmolol, and sympathetic and vagal discharges after laryngotracheal diltiazem for abolishing the pressure response have been stimulation often increase the plasma norepinephrine conducted to the best of our knowledge. Hence, the present [3] concentration. This change is of limited significance in study with a substantial sample size was planned to compare healthy patients but may prove fatal in patients with the aforesaid. [4] cardiovascular instability, causing sudden deaths. These cardiovascular responses may have serious consequences, including myocardial ischemia, dysrhythmias, METHODS pulmonary oedema, sudden left ventricular failure, cerebrovascular haemorrhage and at times even cardiac arrest. Hence, abating the pressure response to laryngoscopy The present study was conducted for 15 months from March and intubation has become one of the most researched topics 2018 to May 2019 in our hospital after receiving an approval in the field of anaesthesiology. These changes are tolerated from the institutional ethics committee. This prospective, quite well by healthy patients, however patients suffering randomized, double-blind, controlled clinical study from coronary artery disease, hypertension, valvular heart comprised 220 normotensive consented male and female disease, stroke, intracranial lesions, and penetrating eye patients aged 18–60 years. injuries are not able to withstand them. In these patients, The sample size is calculated by taking mean of the pulse myocardial reserve is decreased, and tachycardia associated rate after the drug administration from the following studies with laryngoscopy and intubation cause myocardial using WIN PEPI software. [5] ischemia. 1. The mean of pulse rate in the diltiazem group was taken Numerous attempts have been made to modify as 94 after drug administration.[18] haemodynamic responses, including the use of 2. The mean of pulse rate in the lignocaine group was taken premedication; deep anaesthesia; topical anaesthesia; as 81.76 and that of esmolol as 82.96 after drug ganglion blockers and beta blockers,[5] antihypertensive administration.[19] agents such as phentolamine,[6] adjuvants like gabapentin[7] and pregabalin,[8] and vasodilators such as magnesium, Sample size has been calculated by using power analysis Sodium nitroprusside and nitroglycerine[9] are effective in & alpha error of 0.05 and the power of the study as 80%. modifying the responses but require continuous monitoring. They were scheduled for an elective surgery under Various drug regimens and modalities, including opioids, barbiturates, benzodiazepines, beta blockers, calcium channel general anaesthesia with endotracheal intubation of ASA blockers, and vasodilators, have been commonly used for physical status I and II. Patients with ASA grade III or more; blunting the stress response to laryngoscopy and receiving beta blockers or calcium channel blockers; with intubation.[10-12] However, none of them have proved to be significant hepatorenal disease, uncontrolled hypertension, ideal due to their limitations and side effects. Thus, the search diabetes, and significant respiratory or cardiovascular for an ideal agent to negate the haemodynamic responses of diseases; posted for emergency surgeries; undergoing laryngoscopy and intubation has never ceased. difficult tracheal intubation; and who are underweight or Esmolol, [methyl 3-{4-(2–hydroxyl–3)-isopropylamino obese were excluded from the study. propoxyl] phenyl} proprionate HCl] is a cardioselective water After a meticulous preanaesthetic examination, the soluble ultrashort acting α-1 adrenergic receptor antagonist patients were randomly divided into Groups D, E, L, and N of that can be administered only intravenously. 55 each by using a closed envelope technique. Esmolol is rapidly hydrolysed by cytoplasmic esterases in The name of 4 groups of drugs were equally written in red blood cells and hence has a short elimination period of 220 opaque envelopes and sealed. The sealed envelopes were approximately 9 min., a distribution half-life of 2 min and a placed in a container and shuffled. After shuffling, the sealed peak haemodynamic effect within 6 to 10 min. of envelopes were numbered from 1 to 220 in sequence. Sealed administration. Its metabolism is not influenced by renal or envelope were opened in sequence corresponding to the hepatic function and less than 1% excreted in urine as number of the patient. Double blinding was done to avoid any [13] unchanged drug. bias. Esmolol is a striking option because of its cardio- Groups D, E, and L received an injection of diltiazem (0.2 selectivity and ultra-short duration of action, but it can only mg/Kg), esmolol (2 mg/Kg), and lignocaine (1.5 mg/Kg), be administered intravenously.[14] respectively, whereas Group C received 3 mL normal saline. Calcium channel blockers are also preferred because All the groups received the aforementioned as a bolus myocardial depression produced by them is minimized by intravenously 2 min before laryngoscopy and intubation. reduction in afterload so that cardiac